Rickard Cullman

collaborators

4 papers

math.DS2026

Primitive Averages, Directional Expansivity, and Quantitative Twisted Recurrence for Ergodic $Z^{d}$ -Actions

Rickard Cullman, Sean Skinner

We prove two new results about probability preserving actions $T : Z^{d} ↷ (X, I^¼)$ . First, for a function $f \in L^{2} (I^¼)$ , we provide an explicit formula for the…

math.DS2026

Locally integrable cross sections and their intersection covolume

Nachi Avraham-Re'em, Michael BjÃ¶rklund, Rickard Cullman

We study systematically cross sections of probability preserving actions of unimodular groups and their associated transverse measures, and introduce the invariant \emph{intersecti…

math.DS2025

Periodicity of point processes in abelian groups without lattices

Nachi Avraham-Re'em, Michael BjÃ¶rklund, Rickard Cullman

We investigate the intersection covolume of cross sections for probability preserving actions of a class of abelian groups without lattices, including $p$ -adic groups and the group…

math.DS2025

Ehrhart spectra of large subsets of $Z^{r}$

Michael BjÃ¶rklund, Rickard Cullman, Alexander Fish

This paper introduces and studies the Ehrhart spectrum of a set $E \subseteq Z^{r}$ , defined as the set of all Ehrhart polynomials of simplices with vertices in $E$ , general…

Primitive Averages, Directional Expansivity, and Quantitative Twisted Recurrence for Ergodic Zd-Actions

Locally integrable cross sections and their intersection covolume

Periodicity of point processes in abelian groups without lattices

Ehrhart spectra of large subsets of Zr

Primitive Averages, Directional Expansivity, and Quantitative Twisted Recurrence for Ergodic $Z^{d}$ -Actions

Ehrhart spectra of large subsets of $Z^{r}$